Human growth hormone -- abbreviated HGH -- is a substance naturally produced by a small gland in your brain called the pituitary gland. Synthetic or man-made versions of HGH may be used to treatment children who have HGH deficiency, kidney disease, Turner's syndrome or Prader-Willi syndrome. Additionally, HGH may be used to help adults with AIDS-induced weight loss or growth failure. Before receiving treatment with this form of hormone therapy, discuss the main side effects of HGH with your primary medical provider.
Unusual Body Sensations
You may develop unusual body sensations as a side effect following treatment with HGH. Sensations of itching, numbness, tingling, burning, prickling or crawling may arise across any region of your body, Drugs.com warns. You may also experience a temporary loss of your sensation of touch. In combination, these side effects may interfere with your ability to perform certain physical activities, such as picking up a cup or utensil or walking about normally without assistance. Discuss these unusual body sensations with your doctor if they become bothersome or severe.
Dizziness or Blurred Vision
Dizziness may arise as a side effect of HGH treatment. Episodes of dizziness may occur at any time but may be most apparent when you attempt to stand up. Dizziness may also be accompanied by blurred or fuzzy vision. These side effects may make it difficult for you to navigate while walking. Dizziness and blurred vision may be especially dangerous if these side effects occur while you are driving or participating in potentially hazardous activities. If you feel dizzy, remain seated until the sensation passes to limit your risk of injury from tripping or falling down. Contact your medical provider for further evaluation and care if dizziness or blurred vision does not subside or increases in severity.
Headache or Ear Problems
While taking HGH, you may experience recurrent, severe headache pain. Headache discomfort may limit your ability to remain focused, attentive or active during your daily routine. Certain people -- particularly children -- may be at an increased risk of developing ear infections or other ear-related problems during treatment with HGH. Seek care from your physician if you develop ear pain, difficulty hearing or pounding in your ears, to ensure you receive prompt and appropriate care.
Swelling
Swelling is a potential side effect associated with HGH, especially in adults. Fluid retention typically affects the arms, hands, legs or feet and may make it difficult to move the affected body region. Talk with your doctor if swelling becomes bothersome or severe.
Joint or Muscle Pain
Joint or muscle pain may occur while you are receiving treatment with HGH. Such effects are typically accompanied by other flu-like symptoms, such as fatigue, fever or upset stomach.
Injection Site Reactions
Generally, HGH is administered as an injection into your muscle or beneath the surface of your skin. You may develop a mild injection site reaction at the site of HGH treatment. The treated skin region may appear swollen, red or bruised and may be itchy or sore. Such side effects typically subside within a day or two of treatment. If you experience a severe skin reaction after receiving an HGH injection, contact your doctor for additional guidance and care.



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